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Drakon View Drop Down
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    Posted: 26 Aug 2013 at 11:24pm
Before anyone freaks out all these mods are easily reversible.

I noticed the irem m92 pcb the rgb output is way darker than other jamma boards so I added an ultimarc rgb amp with voltage divided inputs before the jamma connector to improve it:



The amp is sitting on electrical tape so removing it would just requires removing the tape, using a heatgun to remove a small amount of hot glue holding the wires in place, and soldering 3 short pins for the rgb traces.

Here's the before and after shots from my supergun:





I noticed the sfx volume was too loud.  I found the trace that connects the sfx pcm stuff to the yamaha music, disconnected it, and added around 2.5k ohms resistance between it to fix the balance:



Here's how the pcb looks and sounds:


http://16bitgamer.forumotion.ca/
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Alpha1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alpha1 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep 2013 at 10:06pm
Very cool. I have this pcb but it is faulty :(
Wanted: Time Traveller, GALAXIAN 3 THEATER, 80's Namco & Taito games

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danny500 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote danny500 Quote  Post ReplyReply Direct Link To This Post Posted: 24 Sep 2014 at 9:11am
i have it too, it's great.....
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